COLUMBIA, S.C.—No. 1 South Carolina added another milestone to what’s shaping up as a truly special season—the biggest comeback in program history. The Gamecocks rallied from 18 points down to beat defending national champion Stanford 65-61 and keep their perfect, 12-0 start alive. Aliyah Boston had 18 points, including the go-ahead basket with 1:05 left for South Carolina’s second victory this season over a No. 2 team and fifth over a Top-10 opponent. “It shows our power,” Destanni Henderson, who scored 17 points and returned to the starting lineup after missing the past three games due to injury. “It’s hard to compete with us.” Especially in the second half when the speedy Henderson and tall, athletic Boston got going. Still down 45–28 when Hannah Jump nailed a 3-pointer to start the third quarter, the Gamecocks took off on a 22-4 burst that put them ahead 50–49 entering the final period. …